
var path = require('path');
var http = require('http');
var url = require('url');
var fs = require('fs');
var mine = {
     "css": "text/css",
      "gif": "image/gif",
      "html": "text/html",
      "htm": "text/html",
      "ico": "image/x-icon",
      "jpeg": "image/jpeg",
      "jpg": "image/jpeg",
      "js": "text/javascript",
      "json": "application/json",
      "pdf": "application/pdf",
      "png": "image/png",
      "svg": "image/svg+xml",
      "swf": "application/x-shockwave-flash",
      "tiff": "image/tiff",
      "txt": "text/plain",
      "wav": "audio/x-wav",
      "wma": "audio/x-ms-wma",
      "wmv": "video/x-ms-wmv",
      "xml": "text/xml",
      "mp3": "audio/mpeg"
};

var PORT = 2500;

var server = http.createServer(function (request, response) {
    var pathname = url.parse(request.url).pathname;
    var realPath = pathname.slice(1);
    //console.log(realPath);
    var ext = path.extname(realPath);
    ext = ext ? ext.slice(1) : 'unknown';
    fs.exists(realPath, function (exists) {
        if (!exists) {
            response.writeHead(404, {
                'Content-Type': 'text/plain'
            });

            response.write("This request URL " + pathname + " was not found on this server.");
            response.end();
        } else {
            fs.readFile(realPath, "binary", function (err, file) {
                if (err) {
                    response.writeHead(500, {
                        'Content-Type': 'text/plain'
                    });
                    response.end(err);
                } else {
                    var contentType = mine[ext] || "text/plain";
                    response.writeHead(200, {
                        'Content-Type': contentType
                    });
                    response.write(file, "binary");
                    response.end();
                }
            });
        }
    });
});
server.listen(PORT);
console.log("Server runing at port: " + PORT + ".");